Digital Integrated Circuits – 3 MCQ’s

Digital Circuits Electronics & Communication Engineering

This set of Digital Circuits Multiple Choice Questions & Answers (MCQs) focuses on “Digital Integrated Circuits – 3″.

1. CMOS refers to __________
a) Continuous Metal Oxide Semiconductor
b) Complementary Metal Oxide Semiconductor
c) Centred Metal Oxide Semiconductor
d) Concrete Metal Oxide Semiconductor

2. Propagation delay is defined as __________
a) the time taken for the output of a gate to change after the inputs have changed
b) the time taken for the input of a gate to change after the outputs have changed
c) the time taken for the input of a gate to change after the intermediates have changed
d) the time taken for the output of a gate to change after the intermediates have changed

3. MOS families includes __________
a) PMOS and NMOS
b) CMOS and NMOS
c) PMOS, NMOS and CMOS
d) EMOS, NMOS and PMOS

4. Propagation delay times can be divided as __________
a) t(PLH) and t(LPH)
b) t(LPH) and t(PHL)
c) t(PLH) and t(PHL)
d) t(HPL) and t(LPH)

5. Power Dissipation in DIC is expressed in __________
a) Watts or kilowatts
b) Milliwatts or nanowatts
c) DB
d) Mdb

6. The maximum noise voltage that may appear at the input of a logic gate without changing the logical state of its output is termed as __________
a) Noise Margin
b) Noise Immunity
c) White Noise
d) Signal to Noise Ratio

7. The delay times are measured between the __________ % voltage levels of the input and output waveforms.
a) 50
b) 75
c) 25
d) 100

8. Fan-in is defined as __________
a) the number of outputs connected to gate without any degradation in the voltage levels
b) the number of inputs connected to gate without any degradation in the voltage levels
c) the number of outputs connected to gate with degradation in the voltage levels
d) the number of inputs connected to gate with degradation in the voltage levels

9. Depending upon the flow of current from the output of one logic circuit to the input of another the logic families can be divides into _________ categories.
a) 2
b) 3
c) 4
d) 5

10. Fan-in and Fan-out are the characteristics of ___________
a) Registers
b) Logic families
c) Sequential Circuits
d) Combinational Circuits

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